I have no clue if BSPlayer is just meant to work like I want it to. I've found it to be way more convenient storing all my subtitles in one folder (Save downloaded Subtitles to C:\Subs\%F-%SE). The only problem is that BSPlayer does not seem to auto-load subtitles from said folder, thus prompting me to download new ones every time.

Is this intended? Is it on the to-be-fixed/intergrated list? Is there an option to auto-load subtitles from that folder? If it has been asked again; sorry, it's just that the search function showed way too much random stuff to filter through.

That is the folder where downloaded subtitles are stored. By default, BSPlayer searches for subtitles in movie folder or in movie folder\subs.
It does not search in other folders. To do that you must specify that in subtitles preferences (right bottom corner) the folder in which BSPlayer should search for subtitles. Click the browse button and then add.